Method for determining the condition of engine oil based on TBN

Details Method for determining the condition of engine oil based on TBN Method for determining the condition of engine oil based on TBN

1998-03-12

1999-11-23

McCall, Eric S.

Measuring and testing

Vehicle chassis

Steering

73113, 340438, 3404503, 3404574, 701 1, 701123, F01M 1110

Patent

active

059879769

ABSTRACT:
A method for monitoring the condition of oil in an engine is disclosed which includes the steps of determining a plurality of parameters, determining a fuel injection model, determining the area of the cylinder walls that is coated with fuel, and responsively determining a total base number (TBN) model. The TBN determined from the model may be trended over time to predict the useful life of the oil.

REFERENCES:
patent: 4506337 (1985-03-01), Yasuhara
patent: 4706193 (1987-11-01), Imajo et al.
patent: 4796204 (1989-01-01), Inoue
patent: 4862393 (1989-08-01), Reid et al.
patent: 5043697 (1991-08-01), Ayabe et al.
patent: 5382942 (1995-01-01), Raffa et al.
patent: 5523692 (1996-06-01), Kuroyanagi et al.
patent: 5750887 (1998-05-01), Schricker
ASN 8/749,603 filed Nov. 18, 1996 (Docket No. 95-401) David R. Schricker.
ASN 8/961,445 filed Oct. 30, 1997 (Docket No. 97-503) Jagannathan Sarangapani, et al.
SAE Paper--1987 #870403 Development of an Automatic Engine Oil-Change Indicator System (Feb. 23-27, 1987).

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